Oh my goodness, no, honey, you did not sound rude (and it takes me a whole lot to think anyone is rude actually)! I did not want to imply that to assume you were not pregnant was a good thing. So while at first I expressed relief for you, then I thought whoops - I better make sure it is an "oh good" situation.
The important thing is that you are feeling better and I am so happy to hear it!